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Keratom.DIr
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00611_Field_611.txt
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1997-10-29
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439b
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15 lines
ZEISS OPHTHALMOMETER
Making the measurement:
In the center of the hollow cross
there is a dotted line. Each of the
solid marks of the line as well as
each space between the dots are
equivalent to 1.00 D. This can be
used to quickly estimate the amount
of astigmatism by noting positioned
of the solid cross on the hollow one
after rotating the instrument without
realigning the crosses.